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Agronomy MCQ Question and Answer | Agriculture MCQ Question

Agronomy MCQ Question and Answer with easy explanations in Agriculture mcq. Agronomy MCQ section is suitable for aspirants preparing for IBPS- AFO (Agriculture Field Officer) Iffco, Kribhco, NFL, NSC, ICAR-JRF/SRF/ ARS, IARI, SADO, DDA,ADA,FCI,ASRB,B.Sc Agriculture and M.SC Agriculture. Page-3 section-3

Each section contains 100 MCQs on Agronomy .
21
The slow growing species of legume root nodule bacteria are included in bacterial genus
Discuss
Answer & Solution
Answer: Option B
Solution:
Legumes are the family of pulses and they have a specific feature to form a symbiotic association with nitrogen-fixing bacteria present in soil and root nodules. These nitrogen-fixing bacteria are called Rhizobia and belong to the genus Brady rhizobium.
22
Which of the following micronutrients are most widely deficient in Indian soils?
Discuss
Answer & Solution
Answer: Option A
Solution:
Every soil all around the world is not self-sufficient, it may lack specific nutrients required specifically for certain plant types, then to grow such a plant we add the nutrients in the form of fertilizers to the soil. Indian soil is deficient in Zinc and Boron.
23
The principal way in which P and K ions move from the soil to the root of field crops
Discuss
Answer & Solution
Answer: Option C
Solution:
The principle way in which Phosphorus and Potassium ions move from the soil to the root of field crops is Diffusion. While Diffusion is the process of movement of molecules to maintain the net flow of matter from the region of high concentration to a region of low concentration.
24
If the gravimetric moisture content of soil is 15% and the bulk density is 1.4 gram/cubic centimeter, the volumetric moisture content is
Discuss
Answer & Solution
Answer: Option B
Solution:
The volumetric moisture content of a soil = Gravimetric moisture content X bulk density of soil.
Therefore, volumetric moisture content = 15 × 1.4 = 21%
25
The plateau with little growth rate and continuing accumulation of nutrient element in the plants can be defined as
Discuss
Answer & Solution
Answer: Option D
Solution:
The sufficiency range is a range of nutrient concentrations that are considered adequate for high yields. While Nutrient sufficiency is a measure of nutrient concentration in the plant and is determined by plant analysis. Thus the plateau with little growth rate and continuing accumulation of nutrient elements in the plants can be defined as the Sufficiency range.
26
Cultivation of hybrid rice is most popular in
Discuss
Answer & Solution
Answer: Option B
Solution:
Two different parents bred to form a hybrid of rice. IRRI (International Rice Research Institute) is working with its partners to develop new and improved varieties of rice. In 1970, China’s hybrid rice breeding program averted an impending famine, hybrid rice is estimated to be planted on more than 50% of rice growing fields to increase its annual rice yields.
27
Which of the followings is a pulse?
Discuss
Answer & Solution
Answer: Option B
Solution:
Greengram belongs to the legume family and is a pulse, while groundnut also belongs to the same family but it is not a pulse. Castor as the name castor bean seems like a member of the legume family but it belongs to Euphorbiaceae and it is also not a pulse.
28
For maintaining the quality of fibre, jute should be harvested
Discuss
Answer & Solution
Answer: Option D
Solution:
Jute is one of the most important natural fibers. India is the largest producer of Jute. About 4 months after planting, harvesting begins. For good quality fiber yield, it should be harvested just after flowering i.e. before seed formation.
29
In Post Green Revolution Era, we have experienced
Discuss
Answer & Solution
Answer: Option B
Solution:
Every practice has pros and cons, likewise, the green revolution also had some after effects, like loss of soil fertility, soil toxicity, soil erosion, inadequate water resources, lacking and salinity of underground water, and global warming which all lead to negative impacts of over adoption of agricultural technologies ultimately resulting in Decreasing factor productivity.
30
In wet season, the initiation of panicle primordia in rice variety of 120 days duration takes place in
Discuss
Answer & Solution
Answer: Option A
Solution:
Panicle initiation i.e. PI is the start of the reproductive phase of rice development. So, in a total of 120 days of rice plantation, Panicle initiation starts about 60 - 65 days after sowing.